# include <iostream.h> # include <conio.h> # include <graphics.h> # include <math.h> void Circle(int Radius,int xC,int yC); void main() { int gDriver=DETECT, gMode; initgraph(&gDriver,&gMode,\"c:\\\\tc\\\\bgi\"); int Radius, xC, yC; cout<< endl << \"Enter Center point coordinates...\"; cout<<endl<<\" Xc : \"; cin>>xC; cout<<endl<<\" Xc : \"; cin>>yC; cout<<endl<<\"Radius : \"; cin>>Radius; cleardevice(); Circle(Radius,xC,yC); getch(); return; } void Circle(int Radius,int xC,int yC) { int P; int x,y; void Draw(int x,int y,int xC,int yC); P = 1 - Radius; x = 0; y = Radius; Draw(x,y,xC,yC); while (x<=y) { x++; if (P<0) { P += 2 * x + 1; } else { P += 2 * (x - y) + 1; y--; } Draw(x,y,xC,yC); } } void Draw(int x,int y,int xC,int yC) { putpixel(xC + x,yC + y,12); putpixel(xC + x,yC - y,12); putpixel(xC - x,yC + y,12); putpixel(xC - x,yC - y,12); putpixel(xC + y,yC + x,12); putpixel(xC - y,yC + x,12); putpixel(xC + y,yC - x,12); putpixel(xC - y,yC - x,12); }